精密压力表比对是为了验证不同实验室之间对精密压力表检定结果的一致性,它涉及活塞压力计是否准确、实验室环境是否满足要求、人员操作是否正确等主要因素。但是,还有一些因素也会对比对结果产生影响,这就要求在比对工作中加以注意,以便使比对结果更能反映参比实验室工作中存在的真实问题。一、每次检定的时间间隔精密压力表比对,一般至少应对精密压力表进行3次以上全量程的进回程检定。由于弹簧管一般存在弹性后效,一次检定结束后,指针完全归零需要一定 Precision pressure gauge comparison is to verify the consistency between different laboratories on the accuracy of the pressure gauge test results, it involves the accuracy of the piston pressure gauge, the laboratory environment to meet the requirements, the correct operation of personnel and other major factors. However, there are a number of factors that will affect the results by comparison. This requires careful attention in the comparison work in order to make the comparison results more reflect the real problems in the work of reference laboratories. First, the time between each test precision pressure gauge comparison, generally at least the precision pressure gauge should be carried out more than 3 times the full range of the back and forth test. Because the spring tube generally has the elasticity after the effect, a test after the end, the pointer completely zero needs a certain